Nope, you don’t have to lug around a bulky portable battery to recharge your iPhone or Android phone’s dwindling battery in the middle of the day.

About the size of a lipstick and weighing in at just 2.7 ounces, the Anker PowerCore+ mini ($13, down from its $40 list price) packs in enough juice to give a standard-size iPhone or Android phone a full charge, or about a 70 percent charge to a jumbo iPhone 6/7 Plus or an Android “phablet.”